3-Piece Airlock 4 Pack with 4PCS #6 Stopper and 8PCS Grommets, Fermentation Airlock Beer Wine Kombucha Brewing Kit,Carboy Airlock FDA Transparency Upgraded

The 3-Piece Airlock 4-Pack with stoppers and grommets is exactly what I needed for brewing. Everything fits securely, creates a proper seal, and works perfectly for fermenting beer and wine. The quality feels solid, and it’s very easy to use. Highly recommended for homebrewers!

These worked great for my brew demon. Much easier to clean than the other style of airlock.

It came packaged nicely. And it has the rubber pieces which is very useful!

Pretty flimsy plastic one cracked after first use

Great product. They work as intended and have a fair price tag. I like how the plastic is crystal clear hard plastic. Have seen others that have hazy soft plastic and I personally don't care for those. Very simply clean and sanitize.

These are made a very good quality. They provide a very good seal. Their ease-of-use is very high.

Worked great

Everything's fine except for the grommets which are way too small. To make them somewhat functional, you'll need to lubricate the airlock and grommet with water and with a lot of force, you can get the airlock to partially go in--enough so the holes at the bottom clear the grommet. BUT, the grommet is still on the tapered end of the airlock, so I worry it will slip off. I then realized because I forced the grommet on, the outside diameter had to change, so I re-measured with a caliper and indeed it did grow to about 1/2 inch. What this means is you need to drill a 1/2 inch hole to allow the grommet space to expand. BUT, this also means the grommet will fit loosely in the hole and since you have to push so hard to insert the airlock, you'll want to hold the grommet from the underside to make sure it doesn't push out. For me, this is really annoying because I wanted to pull out the airlock to take gravity samples. That's not an option with these (don't want to remove the lid and risk contamination to put the airlock back on). Instead, I'll drill another hole for that and fill it with a stopper. Unfortunately, I lack any spare grommets the right size. And all places online I've checked only sell kits which will essentially double the final price of these airlocks. If I can't find a hardware store that sells just one or two, or find a friend that has some the right size, I'll just hope the airlocks stay on. I would've returned them, but I don't want to wait for a replacement (really want to brew tomorrow). Oh, and it looks like the airlock diameter is metric (12 mm), so maybe a 7/16 inch grommet will work... What a pain. I can not for the life of me figure how they got that wrong. I can't believe we now need to ask "does everything fit together right"? I'm assuming the bungs are better sized, so that's why I gave it three stars.

Product came earlier than expected and was undamaged along its time being shipped. This is a great carboy rubber stopper kit for the price. 10/10